Carburetor



June 23, 1931. G. ASHTON ET AL CARBURETOR Original Filed Aug. 1 1927JZyfe Patented June 23, 1931 UNITED. STATES PATENT OFFICE -.GEOItGEASHTON, GEISELGASTEIG, NEAR IVIUNICH, AND GOTTFRIED FREE, OF MUNICH,GERMANY, ASSIGNORS TO ARNOLD HAEFELI, OF MUNICH, GERMANY CARBURETOROriginal application filed'August 15, 1927, Serial No. 213,022, and inGermany April 16, 1927. Divided and i v f this application filed May 28,1929. Serial No. 366,682.

This invention relates to jet carburetors, and has for its object toprovide readily adjustable means to control the jet and air by means ofa horizontally disposed rotatable piston device, and is a division of U.S. pat- 'ent application Serial N0.213,022, filed Auj gust 15, 192?which matured to Patent 1,778,444 issued Oct. 14,1930.

.Theinvention consistsot a carburetor of the jet type in which the jetsare arranged transversely of the mixture outlet to which the mixturesupply pipe or engine intake is connected, the air inlet to thecarburetor being controlled by a rotatable member parallel 5 to the jetshaving controlling edge inclined to thehorizont'ally directed slot abovethe jet orifices,an'd thereby upon rotation gradually regulating thepassage of mixture from the slot to the intake.

Referring to the drawings in which like parts are similarly designatedFigure 1 is a vertical section of a carburetor embodying the invention.

7 Fig. 2 is a cross-section on line 22 of Fig. 1.

and

Fig. 4 is a section on the line 4 i of Fig. 1. V The float chamber 2contains the usual float. The liquid fuel in chamber 2 passes from thefloat chamber through a hole i into a narrow vertical chamber or slot 5,closed at its top at the liquid levelby a horizontally disposedrotatable jet tube 6 in the bottom of which are disposed several jetorifices 7, and directly above them in the upper wall of the tube 6 is alongitudinal slot 8. I

1 This slot 8 lies in the path'ot the carburetting air entering anopening 10 {extending along the slot 8, and the mixture is con- 7trolled by a rotary throttle valve 9." Both the valve 9 and tube 6 seatin simple bores in-the body or casingof the carburetor. The valve 9 hasa longitudinal passage 11 therethrough for the passage of the mixture tothe engine in-take connection 12.

The edge of the passage 11 through the valve proximate the slot 8 of thejet tube 6 has an inclined lip 20, either straight or Fig. 3 is a viewofthe rotatablemember,

float 1 and fuel inlet 3 controlled by the a slightly curved, and thevalve may be angularly displaced in the direction of the arrow 21, Fig.2, to admit more or less mixture to the engine, and the inclined edge 20will very gradually control the mixture.

A screw 13 cooperates with a recess 2:2 in

the valve to adjust the valve 9 to correspond to the idle running of theengine.

Weclaim- 1. The combination with .a carburetor body, a float chamber anda narrow slot-like chamber into which the float chamber discharges; of ahorizontal tube closing the top of the latter chamber the lower Wall ofwhich tube has jet openings at the liquid level and whose upper wall hasa slot over said openings, said tube being mounted in a bore of thecarburetor body, a horizontal air inlet opening at about the level ofsaid slot, a second, larger bore in the carburetor body, a rotatablethrottle valve in the bore past said opening and having a horizontalpassage therethrough, said passage proximate the slot in the tube, thevalve passage having a controlling edge inclined to the axis of thevalve to gradually control the mixture formation, and adjustable meansto limit the rotation of the valve for idle engine running.

2. The combination with a carburetor body, a float chamber, and a narrowvertical slotlike chamber into which the float chamber discharges, andan air intake extending above transverselyacross said vertical chamber;of a horizontal tube closing the top of the vertical chamber, the lowerwall of the tube having holes communicating with the vertical chamberand whose upper wall has a slot dis charging into the intake, a rotarycylinder valve proximate the tube and parallel therewith and having atransverse passage theret-hrough' for registering with the intake andprovided with a bevel edge controlling the intake air to variabledistances across the slot in the upper wall of said tube withoutthrottling the slot.

In testimony that we claim the foregoing as our; invention, we havesigned our names hereto.-

GEORGE ASHTON. GOTTFRIED FRET.

